public class AndrewJackson {
    public static void main(String[] args){
//        变量的创建
        byte a=10;
        double b=3.14;
        char c='a';
        boolean d=true;
        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println(d);
    }
}
